JP6762182B2 - Sewage pump equipment with air bleed valve - Google Patents

Description

The present invention relates to a sewage pump facility provided with an air bleeding valve.

Conventionally, in sewage pump equipment, an air bleeding valve (air bleeding valve, air valve) is provided in the vicinity of the water feeding pump in order to prevent obstacles due to air accumulation in the water supply pipe (for example, Patent Document 1 reference).

Japanese Unexamined Patent Publication No. 2012-246941

The air bleeding valve used in such equipment has a relatively narrow flow path provided in the water stop portion (airtight portion). If solid matter adheres to the water stop part, malfunction may occur. When a malfunction occurs, it is necessary to disassemble the air bleeding valve having a complicated structure. Conventionally, a great deal of labor has been spent on inspection and repair work of the air bleeding valve.

An object of the present invention is to provide a sewage pump facility in which labor required for inspection and repair of an air bleeding valve is reduced.

According to one aspect of the present invention, an air bleeder having a water supply pump, a water supply pipe through which water from the water supply pump flows, a first port fluidly connected to the water supply pipe, and a second port for exhaust. Water is supplied to the air bleeding valve via the valve, a filter arranged between the water pipe and the first port and having a filter surface for blocking the entry of a solid substance into the air bleeding valve, and the second port. The reverse cleaning system includes an exhaust pipe through which air from the second port flows, a water supply pipe through which water for back cleaning flows, and a connection destination of the second port. that having a, a switching mechanism for switching between the water supply pipe and the exhaust pipe, sewer pumping equipment is provided.

According to another aspect of the present invention, the water supply pump, the water supply pipe through which the water from the water supply pump flows, and the first port fluidly connected to the water supply pipe and the second port for exhaust are each provided. A plurality of air bleeding valves, a plurality of filters each having a filter surface arranged between the water supply pipe and the first port and blocking the entry of a solid substance into the air bleeding valve, and the second A sewer pump facility comprising a reverse cleaning system that supplies water to the plurality of air bleeding valves via each of the ports, the reverse cleaning system being configured to be capable of individually cleaning the plurality of air bleeding valves. Is provided.

According to the aspect of the present invention, the filter suppresses the ingress of solid matter into the inside of the air bleeding valve. In addition, the reverse cleaning cleans the filter and the inside of the air bleeding valve. As a result, the malfunction of the air bleeding valve due to the adhesion of solid matter is prevented, and the labor required for the inspection and repair work of the air bleeding valve is reduced.

It is a schematic diagram which shows one Embodiment of a pump equipment. It is a schematic diagram for demonstrating an air bleeding valve. It is a schematic diagram which shows the back cleaning system. It is a schematic diagram which shows an example of a filter.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing an example of a pump facility (sewage pump facility) 10. As shown in FIG. 1, the pump equipment 10 includes an inlet gate 12, a pump well (storage tank) 14, a sand sink (connecting well) 16, a discharge culvert (discharge flow path) 18, and a rainwater pump (first). A pump (pump, pump) 20, a water supply pump (second pump, drainage pump, pressure feed pump) 22, a water supply pipe (pressure feed pipe) 24, and an air bleeding valve (sewage air valve) 26 are provided.

In the pump equipment 10, water including rainwater and the like flows into the pump well 14 through the inlet gate 12. The water in the pump well 14 is pumped into the sand basin 16 by the rainwater pump 20. In the sand basin 16, substances such as sand that have flowed with water sink. Also, if necessary, relatively large debris is removed via means such as a screen (not shown). The treated water is discharged to the outside such as a river through the discharge culvert 18. On the other hand, the retained water (sewage) is discharged by the water supply pump 22. The water pipe 24 is fluidly connected to the water pump 22. Water from the water supply pump 22 flows through the water supply pipe 24. The water discharged through the water supply pipe 24 is sent to an external facility such as a water treatment facility.

The air bleeding valve 26 is fluidly connected to the water pipe 24. In one embodiment, a plurality of air bleeding valves 26 are arranged side by side along the axial direction of the water supply pipe 24 (extending direction of the water supply pipe 24, water flow direction). The plurality of air bleeding valves 26 can be arranged in series or in parallel. The number of air bleeding valves 26 can be 1, 2, 3, 4, or 5 or more. The air bleeding valve 26 is used for preventing equipment failure due to air pools in the water pipe 24 and the like. The air in the water pipe 24 is appropriately discharged to the outside through the air bleeding valve 26.

FIG. 2 is a schematic view for explaining the air bleeding valve 26. In the example shown in FIG. 2, a valve 30 (for example, an on-off valve or a manual valve) is provided between the air bleeding valve 26 and the water pipe 24. The air bleeding valve 26 includes a first port 31, a second port 32, a float 33, a valve body 34, a valve seat 35, a first chamber 36, a second chamber 37, and a third chamber 38. Be prepared.

A float 33 is arranged in the first room 36. The float 33 is configured to generate a buoyancy that lifts the valve body 34 with respect to the water stored in the first chamber 36. The first port 31 is provided at a position below the first chamber 36. A valve body 34 is arranged in the second chamber 37. The second chamber 37 is configured to have a space in which the valve body 34 can move up and down. A second port 32 for exhaust is provided at a lateral position or an upper position of the third chamber 38. A valve seat 35 is provided in a portion (for example, a partition 39) between the second chamber 37 and the third chamber 38. The partition portion (wall portion) 39 between the second chamber 37 and the third chamber 38 has a flow path (air flow path, ventilation hole, air hole) 39a. In one example, the air bleed valve 26 can further have a diaphragm, a spring, a pressure chamber (all not shown) and the like. A water stop portion (airtight portion) is formed by at least a part of a valve body 34, a valve seat 35, a second chamber 37, a third chamber 38, a partition portion 39, and a flow path 39a. A relatively narrow flow path is formed in such a water stop portion.

The first port 31 is fluidly connected to the water pipe 24. In the air bleeding valve 26, a flange is provided in the vicinity of the first port 31. The flange and the first flange of the valve 30 are connected. Further, the flange provided on the water pipe 24 and the second flange of the valve 30 are connected. The fluid from the water pipe 24 flows into the air bleeding valve 26 via the valve 30.

In an example of the air bleeding valve 26, in the initial state, as shown in FIG. 2A, the float 33 is in the lowered state, and a gap is provided between the valve seat 35 and the valve body 34. The air passes through the flow path 39a of the partition portion 39 and the like, and is discharged to the outside through the second port 32 (initial exhaust). When the water supply pump 22 operates, the pressure in the water supply pipe 24 rises. When the pressure in each chamber 36, 37, 38 of the air bleeding valve 26 rises, a large amount of air is discharged from the second port 32 (a large amount of exhaust under pressure) due to the movement of the diaphragm (not shown). When a certain amount of water is stored in the first chamber 36 and the float 33 rises, the valve body 34 comes into contact with at least a part of the partition portion 39 as shown in FIG. 2 (b). For example, the opening of the flow path 39a of the partition 39 is closed. As a result, air is trapped in at least a part of the chambers 36, 37, 38 (filling closure). On the other hand, the air in the water pipe 24 flows into the first chamber 36. When a certain amount of air is accumulated in the first chamber 36, the liquid level drops. When the float 33 is lowered, the confinement of air is released, and air is discharged from the second port 32 (exhaust under pressure). When the inside of the air bleeding valve 26 becomes negative pressure, the valve body 34 is pushed down. As a result, a gap is formed between the valve seat 35 and the valve body 34, and air can be sucked through the second port 32.

As shown in FIG. 3, in one embodiment, the pump equipment (sewage pump equipment) 10 further includes a filter 40 and a backwash system 50. The filter 40 is arranged in the vicinity of the first port 31 of the air bleeding valve 26, and has a filter surface 42 that blocks the entry of solid objects into the air bleeding valve 26. The filter 40 is arranged between the water pipe 24 and the first port 31 of the air bleeding valve 26. In one example, the filter 40 has a plate-like member including a filter surface 42. In another example, the filter 40 can have a member of a different shape.

For example, as shown in FIG. 4, the filter surface 42 of the filter 40 is provided with a plurality of holes / a plurality of openings. In the example of FIG. 4A, a plurality of through holes are provided on the filter surface 42 of the filter 40. In one example, the shape of the through hole can be circular or elliptical. In another example, the through hole can have other shapes. In the example of FIG. 4B, the filter surface 42 of the filter 40 has a mesh structure. The shape and / or size of the through hole / mesh (opening) can be appropriately set depending on the shape and size of the solid object to be removed. In another example, the filter 40 can have another structure that allows liquids to pass through and blocks the entry of solids. Further, the filter 40 may have a multi-stage configuration.

Returning to FIG. 3, in one example, the filter 40 is arranged near the flange portion for fastening the air bleeding valve 26 and the valve 30 (near the first port 31). The solid matter in the fluid from the water pipe 24 is blocked by the filter 40, and the solid matter is prevented from entering the air bleeding valve 26. In one embodiment, the filter surface 42 is arranged downward. At least a portion of the solid material falls off the filter surface 42. The residue of the solid matter can be removed from the filter surface 42 by the backwash system 50.

The backwash system 50 is configured to supply water to the air bleed valve 26 via the second port 32. In the reverse cleaning system 50, the exhaust pipe 52 through which the air from the second port 32 flows, the water supply pipe 53 through which the water for reverse cleaning flows, and the exhaust pipe 52 and the water supply pipe 53 are connected to the second port 32. It has a switching mechanism 54 for switching between. In one example, the switching mechanism 54 has a first valve 56 connected to the exhaust pipe 52 and a second valve 57 connected to the water supply pipe 53.

In one example, at least a part of the switching mechanism 54 is arranged at a position lower than the second port 32 of the air bleeding valve 26 and the water stop portion (airtight portion). For example, the first valve 56 and the second valve 57 are arranged at positions lower than the second port 32 and the water stop portion of the air bleeding valve 26. The water from the water supply pipe 53 flows through the pipe connected to the second port 32 of the air bleeding valve 26 via the second valve 57. The water discharged from the second valve 57 reaches the second port 32 after moving upward on the way. That is, the water flow path for backwashing includes an upward flow path. The air discharged from the second port of the air bleeding valve 26 moves downward on the way and then moves upward through the first valve 56. After that, it is discharged to the outside from the exhaust pipe 52. That is, the air bleeding flow path includes a downward flow path and an upward flow path. In another example, at least a part of the switching mechanism 54 can be arranged at a position higher than the second port 32 and the water stop portion of the air bleeding valve 26.

When the pump equipment (sewage pump equipment) 10 has a plurality of air bleeding valves 26 (see FIG. 1), a filter 40 (FIG. 3) is arranged between the water pipe 24 and the plurality of air bleeding valves 26. be able to. Each of the plurality of air bleeding valves 26 can be configured to have a first port 31 fluidly connected to the water pipe 24 and a second port 32 for exhaust. The backwash system 50 can be configured to individually supply water for backwash to each of the plurality of air bleeding valves 26. Alternatively, the backwash system 50 can be configured to simultaneously supply all of the plurality of air bleeding valves 26 with water for backwash.

During normal operation, as shown in FIG. 3A, the first valve 56 is opened and the second valve 57 is closed. The air discharged from the air bleeding valve 26 is discharged to the outside through the exhaust pipe 52. The solid matter in the fluid from the water pipe 24 is blocked by the filter 40. A part of the solid matter adheres to the filter surface 42 or stays in the vicinity of the filter surface 42.

At the time of backwashing, as shown in FIG. 3B, the first valve 56 is closed and the second valve 57 is opened. Water for reverse cleaning (for example, miscellaneous water, factory water, predetermined cleaning water) is supplied from the water supply pipe 53 toward the air bleeding valve 32. Water enters the internal space of the air bleeding valve 32 via the second port 32 of the air bleeding valve 32. The water as a whole flows inside the air bleeding valve 32 from top to bottom and is discharged from the first port 31.

When the water during the back cleaning flows in the direction opposite to that during the normal operation, the solid matter adhering to the filter surface 42 or staying near the filter surface 42 receives the force of the water and separates from the filter surface 42. For example, the solid matter flows downward from a position near the filter 40 toward the water pipe 24 along the flow of water.

In this way, the filter 40 (filter surface 42) is cleaned by the back cleaning process using the back cleaning system 50. Further, in the reverse cleaning process, the inside of the air bleeding valve 32 is also cleaned. For example, fine solid matter that passes through the filter 40 is discharged from the inside of the air bleeding valve 32 to the outside.

Control of the backwash process (eg, control of opening and closing valves 56, 57) can be performed automatically or manually. For example, the backwash process can be performed periodically or irregularly at predetermined time intervals. Alternatively, the timing of executing the backwash process can be determined based on the result of monitoring a predetermined value (for example, degree of contamination, flow rate, flow rate, pressure, etc.). The backwash processing time (continuous operation time) per operation can be set to a predetermined value. Alternatively, the timing of stopping the backwash or the continuous operation time can be determined based on the result of monitoring a predetermined value.

Generally, an air bleeding valve for sewage (sewage air valve) has a complicated structure that does not interfere with a water stopping function or a movable function as compared with an air bleeding valve for fresh water. In such a structure, the flow path provided in the water-stop portion (airtight portion) is relatively narrow.

In the pump equipment 10 described above, the filter 40 suppresses the ingress of solid matter into the air bleeding valve 26. Further, the back cleaning process using the back cleaning system 50 cleans the filter 40 and the inside of the air bleeding valve 26. As a result, in the pump equipment 10, malfunction of the air bleeding valve 26 due to adhesion of solid matter is prevented, and the labor required for inspection and repair work of the air bleeding valve 26 is relatively small.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. The numerical values used in the above description are examples, and the present invention is not limited thereto. Configurations can be added, omitted, replaced, and other modifications without departing from the spirit of the present invention.

10: Pump equipment (sewage pump equipment),
12: Entrance gate,
14: Pump well (water tank),
16: Settling basin (connecting well),
18: Discharge culvert (discharge channel),
20: Rainwater pump (1st pump, pumping pump),
22: Water pump (second pump, drainage pump, pressure pump),
24: Water pipe (pressure pipe),
26: Air bleeding valve (sewage air valve),
30: Valve,
31: 1st port,
32: 2nd port,
33: Float,
34: Valve body,
35: Valve seat,
36: Room 1,
37: Room 2,
38: Room 3,
39: Partition (wall),
40: Filter,
42: Filter surface,
50: Backwash system,
52: Exhaust pipe,
53: Water supply pipe,
54: Switching mechanism,
56: 1st valve,
57: Second valve.

Claims (6)

With a water pump
A water pipe through which water from the water pump flows,
An air bleeding valve having a first port fluidly connected to the water pipe and a second port for exhaust.
A filter, which is arranged between the water pipe and the first port and has a filter surface for blocking the entry of solid matter into the air bleeding valve.
A reverse cleaning system that supplies water to the air bleeding valve via the second port,
Equipped with a,
In the reverse cleaning system, an exhaust pipe through which air from the second port flows, a water supply pipe through which water for reverse cleaning flows, and a connection destination of the second port are between the exhaust pipe and the water supply pipe. and a switching mechanism for switching, that have a, sewer pump equipment. The sewer pump facility according to claim 1, wherein the filter surface is arranged downward. The sewer pump facility according to claim 1 or 2, wherein the filter has a plate-shaped member including the filter surface. The sewer pump facility according to any one of claims 1 to 3 , wherein the switching mechanism has a first valve connected to the exhaust pipe and a second valve connected to the water supply pipe. With a water pump
A water pipe through which water from the water pump flows,
A plurality of air bleeding valves, each having a first port fluidly connected to the water pipe and a second port for exhaust.
A plurality of filters, each of which is arranged between the water pipe and the first port and has a filter surface for blocking the entry of solid matter into the air bleeding valve.
A reverse cleaning system that supplies water to the plurality of air bleeding valves via each of the second ports.
Equipped with a,
The reverse cleaning system is a sewer pump facility configured to be able to individually clean the plurality of air bleeding valves . The sewer pump facility according to claim 5 , wherein the plurality of air bleeding valves are arranged side by side along the axial direction of the water pipe.

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